Explore popular diseases in clinical trials

Check which popular diseases are currently being frequently studied.

See also our rare diseases glossary and drug database.

Starting by letter

To open the diseases glossary, select a letter from the list below.

Most popular diseases

The list below features the most popular diseases currently involved in ongoing clinical trials.

Disease trials
Non-small cell lung cancer 240
Breast cancer 99
Obesity 92
Prostate cancer 77
Colorectal cancer 69
Ovarian cancer 68
Crohn’s disease 67
Non-small cell lung cancer metastatic 64
Rheumatoid arthritis 55
Squamous cell carcinoma of head and neck 54
Triple negative breast cancer 54
Chronic kidney disease 50
Asthma 50
Hepatocellular carcinoma 47
Neoplasm 47
Acute myeloid leukaemia 47
Colorectal cancer metastatic 46
Overweight 45
Multiple sclerosis 43
Colitis ulcerative 40
Parkinson’s disease 40
HER2 positive breast cancer 39
Gastric cancer 38
Myelodysplastic syndrome 38
Dementia Alzheimer’s type 37
Glioblastoma 36
Bladder cancer 34
Atrial fibrillation 34
Prostate cancer metastatic 34
Renal transplant 33
Ischaemic stroke 33
Diffuse large B-cell lymphoma 32
Chronic obstructive pulmonary disease 32
Head and neck cancer 32
Non-small cell lung cancer stage IV 31
Breast cancer metastatic 30
Coronary artery disease 29
Myasthenia gravis 29
Malignant melanoma 29
Endometrial cancer 28
Cholangiocarcinoma 28
Rectal cancer 27
Pulmonary arterial hypertension 27
Dermatitis atopic 27
Idiopathic pulmonary fibrosis 27
Soft tissue sarcoma 26
Non-small cell lung cancer stage III 26
Plasma cell myeloma 25
Pancreatic carcinoma 25
Small cell lung cancer extensive stage 25
Sepsis 25
Renal cell carcinoma 25
Schizophrenia 24
COVID-19 24
Duchenne muscular dystrophy 24
Non-small cell lung cancer stage IIIB 24
Follicular lymphoma 24
Hormone receptor positive breast cancer 24
Fallopian tube cancer 23
Amyotrophic lateral sclerosis 23
Mantle cell lymphoma 23
Influenza 22
Neoplasm malignant 22
Chronic lymphocytic leukaemia 21
Acute myocardial infarction 21
Major depression 21
Small cell lung cancer 21
Sickle cell disease 21
Interstitial lung disease 21
Cystic fibrosis 21
Breast cancer female 20
Osteoarthritis 20
Glioma 20
Neuroblastoma 20
Chronic rhinosinusitis with nasal polyps 20
Oesophageal adenocarcinoma 20
Myelofibrosis 19
B-cell lymphoma 19
Critical illness 18
Procedural pain 18
Acute kidney injury 18
Psoriasis 18
Axial spondyloarthritis 18
Acute coronary syndrome 17
Vitiligo 17
Hereditary angioedema 17
Relapsing-remitting multiple sclerosis 17
Ewing’s sarcoma 17
IgA nephropathy 17
Gastrooesophageal cancer 16
Juvenile idiopathic arthritis 16
Cardiac failure 16
Uveal melanoma 16
Chronic hepatitis B 16
Allogenic stem cell transplantation 15
Giant cell arteritis 15
Chronic spontaneous urticaria 15
Cardiac arrest 15
Septic shock 14
Malignant melanoma stage III 14

Diseases starting with i

  • 5

    Iron deficiency

    Iron deficiency is one of the most common nutritional problems worldwide, affecting about one-third of the global population. When your body doesn’t have enough iron, it can’t produce adequate amounts of healthy red blood cells, leaving you feeling tired, weak, and short of breath.

  • 2

    Iron deficiency anaemia

    Iron deficiency anaemia is the most common type of anaemia worldwide, affecting millions of people when their bodies lack enough iron to produce healthy red blood cells that carry oxygen throughout the body.

  • 2

    Iron overload

    When the body stores too much iron, it can damage vital organs over time. Though often inherited, iron overload is treatable if caught early, helping prevent serious complications affecting the heart, liver, and other organs.

  • 4

    Irritable bowel syndrome

    Irritable bowel syndrome affects millions of people worldwide, causing uncomfortable digestive symptoms that can disrupt daily life. While there is no cure, understanding the condition and learning to manage it effectively can help you live a full and normal life.

  • 1

    Ischaemic skin ulcer

    Ischaemic skin ulcers are painful, slow-healing wounds that develop when tissues do not receive enough blood, oxygen, and nutrients due to narrowed or blocked arteries, most commonly affecting the feet and legs.

  • 33

    Ischaemic stroke

    Ischaemic stroke is a life-threatening emergency that occurs when blood flow to part of the brain is blocked, most commonly by a blood clot. It is the most common type of stroke, accounting for about 87% of all cases. Every second counts—recognizing the warning signs and getting immediate treatment can be the difference between recovery and permanent disability or death.

  • 0

    Isodicentric chromosome 15 syndrome

    Isodicentric chromosome 15 syndrome is a rare genetic condition caused by extra genetic material from chromosome 15, leading to challenges with development, learning, and sometimes seizures.